Answer:
Hope this helps :D
Step-by-step explanation:
Given:
Total number of marbles = 15
Probability of randomly selecting a green marble =
.
Probability of randomly selecting a green marble, replacing it, and then randomly selecting a blue marble =
.
To find:
The number of blue marbles.
Solution:
Let the number of blue marbles be x.


It is given that,

Probability of randomly selecting a green marble, replacing it, and then randomly selecting a blue marble is
. So,



Multiply both sides by 75.



Therefore, the number of blue marbles in the bag is 6.
The value of 1 penny, 1 nickel, and 1 dime is $0.16. The total value of the coins is 8 times that, so the bank contains 8 of each coin.
X-12 +5x=90
That’s the set up
Let me know if you need more help
Answer:
i think 6x
Step-by-step explanation:
cz we have a variable